Social Service Model and Value Evaluation of Libraries under Sharing Economy

Table 3

Material cost of libraries in 2015–2020.

Year	Item
	Equipment investment	Venue scale	Total amount of physical books	Total amount of electronic resource databases
2015	31	41,583	201.5	68
2016	42	40,532	202.1	72
2017	45	40,532	203.9	77
2018	46	40,532	208.3	80
2019	50	40,612	214.5	86
2020	52	40,612	221.7	94